I let the plumber in my house while I was at work.....?

when I got home things seemed different. I came home to no electricity (there was a fuse blown.) My bedroom door was open (I left it shut.) My icons on my computer were moved around when I started my computer back up. Does it seem like something is strange here, or is it just me? Has anything like this... show more when I got home things seemed different. I came home to no electricity (there was a fuse blown.) My bedroom door was open (I left it shut.) My icons on my computer were moved around when I started my computer back up. Does it seem like something is strange here, or is it just me? Has anything like this happened to you?
Update: the plumber has been in my house before when I wasn't here and once I even came home when he didn't expect me. He wasn't doing anything wrong (just working on the plumbing) he is someone that my landlord knows and trust.
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